For your consideration, here is a Vintage Heiland Light Mount Clamp for Cameras, Multi-Jointed, Heavy Duty, 8 1/2 Inches Long.  It has a little wear on it.  Everything moves and tightens down as it should.  It will be mailed in a box for protection.  Item pictured is the actual item up for sale and comes from a non-smoking household.  (369.84y-.13bx3)